/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendQuerySteps.h
Streams node classes that have been newly registered or unregistered since last call toStream()
class FNodeClassRegistrationEvents : public [Metasound::IFrontendQueryStreamStep](API\Plugins\MetasoundFrontend\IFrontendQueryStreamStep)